Unusual road sign. There was a time when " a hole in the road " was a nuisance and and a mystery. The Wales Gas Board have , however , removed the mystery and apologised for the nuisance of road works on the busy Denigh - Ruthin Road , by erecting an unusual notice board . Maybe some day it will be learnt who makes all the other holes in the roads and why ! Photo shows: The notice board which has been erected by a " hole in the road " on the busy Denigh - Ruthin Road 10 September 1955